N a radioactive decay series that starts with uranium-235 and ends with lead-207 锕系
actinium m series锕系
actinium uranium series锕铀系
actinium decay series[核] 锕衰变系;锕衰变系
uranium m actinium series锕铀系
nuclide of actinium series锕系核素
uranium actinium series锕铀系
actinium-uranittm series锕铀系
uranium-actinium series锕铀系
actinium series compounds锕系化合物
N（名词） a radioactive decay series that starts with uranium-235 and ends with lead-207 锕系